Hello all,
My '93 Honda Accord has developed a problem with starting and holding its idle. After the car has sat overnight or for several hours, it may be hard to start. (Sometimes it starts right away!)
It can take several minutes to start idling well or it may be fine in seconds. It’s all very inconsistent.
Any thoughts?
Thank you,
Bill
I’d suspect fuel pressure or lack thereof .
There’s a few components that controls the engine idle speed.
The first is the idle air control valve.
https://www.rockauto.com/en/moreinfo.php?pk=46695&cc=1167218&jsn=340
Sometimes removing the IAC valve and cleaning it with throttle body cleaner will fix an idle problem. Other times the IAC valve requires replacement.
The IAC valve is also controlled by the PGM/FI relay.
https://www.rockauto.com/en/moreinfo.php?pk=39383&cc=1167218&jsn=350
These relays have been known to be a problem on Honda’s.
There’s also the starting air valve.
So basically, you’re going to need a factory service manual that explains how to test these components, along with the equipment to do so.
Because you don’t want to just throw parts/money at the problem.
Tester